Installation and operating instruction
Oil burner WL20/2-C Z
12 Project planning
83307702 1/2019-04 La
62-80
12 Project planning
12.1 Oil supply
Observe EN 12514-2, DIN 4755, TRÖI and local regulations.
General information relating to the oil supply
Do not use cathode protection system with steel tanks.
With oil temperatures < 5 °C, the separation of paraffin can cause oil lines, oil fil-
ters and nozzles to become blocked. Avoid placing oil tanks and pipelines in
areas subject to frost.
The oil supply should be installed in such a way that the oil hoses can be con-
nected free of tension.
Fit oil filter in front of pump, recommended mesh aperture 70 μm.
Suction resistance and supply pressure
CAUTION
Pump damage due to excessive suction resistance
A suction resistance greater than 0.4 bar can damage the pump.
Reduce suction resistance – or – install oil supply pump or suction unit, whilst
observing the maximum supply pressure at the oil filter.
The suction resistance depends on:
suction line length and diameter,
pressure loss of oil filter and other components,
lowest oil level in the oil storage tank (max 3.5m below the oil pump).
If an oil feeder pump is installed:
max 1.5 bar supply pressure at oil filter,
max 0.7 bar supply pressure into automatic de-aerator.
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